Application of Synthetic Aperture Focusing Technique for inspection of plate-like structures using EMAT generated Lamb waves

被引：0

作者：

Mirchev, Yordan ^{[1
]}

Staykov, Krasimir ^{[2
]}

Ganchev, Damyan ^{[2
]}

机构：

[1] Bulgarian Acad Sci, Inst Mech, Sofia, Bulgaria

[2] Tech Univ Sofia, Sofia, Bulgaria

来源：

13TH NATIONAL CONGRESS ON THEORETICAL AND APPLIED MECHANICS (NCTAM 2017) | 2018年 / 145卷

关键词：

D O I：

10.1051/matecconf/201814505010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The main challenge for guided wave inspection is exact defect characterization and sizing. EMAT generated Lamb waves usually have low signal-to-noise ratio which reduces the defect detection, characterization and sizing capabilities. That's why in most cases the method is used only as a screening tool. The Synthetic Aperture Focusing Technique is a process that increases the signal-to-noise ratio by numerically focusing the acoustic fields. In this paper the application of SAFT is tested over EMAT generated Lamb waves. The improvement of lateral resolution and signal-to-noise ratio is evaluated. Results are presented as a comparison between standard B-scan and SAFT processed data.

引用

页数：8

共 36 条

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